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Storing custom objects in an NSMutableArray in NSUserDefaults
...ray];
if (oldSavedArray != nil)
objectArray = [[NSMutableArray alloc] initWithArray:oldSavedArray];
else
objectArray = [[NSMutableArray alloc] init];
}
You should check that the data returned from the user defaults is not nil, because I believe unarchiving from nil causes a...
Where does Java's String constant pool live, the heap or the stack?
...is in the runtime constant pool. The runtime constant pool memory area is allocated on a per-class or per-interface basis, so it's not tied to any object instances at all. The runtime constant pool is a subset of the method area which "stores per-class structures such as the runtime constant pool,...
What does “dereferencing” a pointer mean?
... // Note earlier ++p and + 2 here => sizes[3]
Pointers to dynamically allocated memory
Sometimes you don't know how much memory you'll need until your program is running and sees what data is thrown at it... then you can dynamically allocate memory using malloc. It is common practice to store ...
Regex: match everything but specific pattern
...thing but a string starting with a specific pattern (specifically index.php and what follows, like index.php?id=2342343 )
...
C++11 emplace_back on vector?
...
If you do not want to (or cannot) add a constructor, specialize allocator for T (or create your own allocator).
namespace std {
template<>
struct allocator<T> {
typedef T value_type;
value_type* allocate(size_t n) { return static_cast<value_type*>...
Declaring variables inside loops, good practice or bad practice?
...n be performed more efficiently by the compiler (most importantly register allocation), since it knows that the variable cannot be used outside of the loop. For example, no need to store the result for later re-use.
In short, you are right to do it.
Note however that the variable is not supposed ...
Why does PHP 5.2+ disallow abstract static class methods?
After enabling strict warnings in PHP 5.2, I saw a load of strict standards warnings from a project that was originally written without strict warnings:
...
Passing arrays as url parameter
...wever, there's a simpler way to do this:
$url = 'http://example.com/index.php?';
$url .= 'aValues[]=' . implode('&amp;aValues[]=', array_map('urlencode', $aValues));
If you want to do this with an associative array, try this instead:
PHP 5.3+ (lambda function)
$url = 'http://example.com/ind...
How to secure database passwords in PHP?
When a PHP application makes a database connection it of course generally needs to pass a login and password. If I'm using a single, minimum-permission login for my application, then the PHP needs to know that login and password somewhere. What is the best way to secure that password? It seems like ...
Where are static variables stored in C and C++?
...riables in duration) are neither on the heap nor the stack, but are rather allocated on memory apart from both of those. Is that right? I suppose I could take a look at an STM32 linker script again to study the memory allocation more too.
– Gabriel Staples
Feb ...